如何在封装的物料组件内部操作scheme

请教一下， 目前有这样一个想法， 在某个行列的布局组件里面有一些操作按钮， 点击操作按钮需要往当前的组件新增一个children， 类似demo工程中 综合场景下的行列容器（剪切行列的那种操作）， 这种类似的组件该如何实现？

Start by reviewing the demo project's integrated row/column container example and how its operation buttons interact with the current component. Clarify the scheme API and the expected behavior for adding a child inside a wrapped material component; done means the interaction is defined and reproducible for this layout scenario.

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